Since journals are now apparently editable with no time limit, I figured I'd provide the public service of listing the active shill accounts I come across on Slashdot. Keep in mind that many employ negative marketing, where they sling mud at competing products and companies rather than promoting their own, and of course posting some balance of personal non-shilling posts is a good way to reduce suspicion.
Here the shills will be listed by the company they are shilling for along with some comments. I'll link to their user pages to make it convenient for you to see their comments and submissions and judge for yourself.
Nintendo shilling has really flared up over the last couple of years and they are currently running the overwhelming majority of astroturf campaigns on Slashdot. Recently there's been a shift towards negative marketing, where the shills say bad things about Microsoft products while subtly plugging Nintendo products. They often call anyone who says anything bad about Nintendo an anti-Mario zealot who's stuck in the past.
GameboyRMH: The unabashed and highly successful shill that inspired me to start this list. Until recently most Nintendo shills were keeping a pretty low profile, but not this guy.
Getting rid of shills
The best way to get rid of shills is intense public shaming. They'll at least start new accounts when one is caught and shamed, and that will cost them karma and slow them down. Busting shills will cost you some karma, both from uninvolved and apathetic Slashdotters who don't like your off-topic comments and from other shills who want to keep shill-busting comments modded down (you'll notice most shill accounts have the "spent all my mod points" achievement). But what's karma for if not to spend it, and why not spend it on something positive?
If anyone has any more to add to this list then please comment. I know there are many but I'm just adding the few that I can remember.